The only royal palace on U.S. soil has been a territorial capitol, a military headquarters, and a prison for a queen.

Once the site of the Hawaiian monarchy, this building was originally designed as a palace.

The largest cemetery in Louisville is the final resting place of Col. Sanders and Muhammad Ali.

The only building in Louisville (hopefully) that contains two ancient holy skeletons.

Locals place their offerings on this nightmarish gnarled tree so the witches won't summon another storm.

This abandoned cemetery has a dark past of bodies buried over bodies.

This stunning gothic ruin was a casualty of the Indiana steel industry crash.

To find the "unicorns of the deep" you've got to go downstairs.

This unauthorized stone mermaid was secretly carved out of public stone before being permanently preserved.

A long lost multi-cultural music venue used to reside in the bottom floor of Chicago's Flat Iron Building.

This awkward aquarium sculpture is one of the strangest statues in Chicago.

These pretty kitties killed and ate as many as 135 railway workers.

An outdoor urban gallery of large-scale artworks by the world's most influential street artists.

Illegal drag racing two stories beneath Chicago’s streets.

The iconic Chicago sculpture hides a beautiful and easily overlooked plaque on the backside.

One of the coolest murals in Minneapolis.

One of two giant blue cockerel statues erected with an intentional double meaning.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

What appears to be a wizard's lair in Milwaukee actually houses a massive water pipe.

Statue dedicated to the star of an old television show.

The bugs crawling down the front of this office building are almost as big as a '68 VW Beetle.

A unique botanical garden housed in three giant geodesic domes.

This striking art museum holds an amazing series of curiosity cabinets.